JP4887128B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine such as a generator or a motor.

  General stators used in generators and motors are composed of a stator core having a plurality of slots opened in the circumferential direction in the circumferential direction, and a plurality of stator windings wound around the respective slots. It is configured. For this reason, the work of winding the stator winding in the narrow slot becomes complicated, not only the workability is poor, but also the problem that the space factor of the stator winding in the slot cannot be improved. was there.

  Therefore, as shown in Patent Document 1, the stator core is configured to have stator claw magnetic poles extending alternately from both sides in the axial direction at a portion facing the rotor, and the stator winding is rotated inside the stator core. One that can be wound around the outer periphery of the child in an annular shape is considered. By adopting such a stator, the workability of winding the stator winding can be improved, and the space factor of the stator winding in the stator core can be improved.

JP 2004-15998 A

  However, since Patent Document 1 uses a permanent magnet to form a magnetic pole in the rotor, the field magnetic flux cannot be changed according to the number of rotations. For this reason, there has been a problem that field magnetic flux is generated even when field magnetic flux is not required.

  An object of the present invention is to provide a rotating electrical machine that can easily wind a stator winding around a stator core.

The above object is a rotating electrical machine in which a plurality of rotors rotate relative to the same stator, and the rotor includes a field winding wound around a rotation axis, and the field winding. A rotor iron core having a rotor claw magnetic pole is provided at a portion facing the stator claw magnetic pole of the stator, and the stator is annularly wound around the outer periphery of the rotor. A stator winding that surrounds the stator winding, and a portion that is formed on the stator core and that faces the rotor alternately from both sides in the axial direction. The stator claw magnetic pole extending, and the stator core is composed of two stator core constituent members having substantially the same shape in which concave portions are formed, and convex portions are formed on both sides between the stators. The non-magnetic material is provided, the concave portion and the convex portion are fitted, and the plurality of stators are It is achieved by configured to make electrical angle constant.

An object of the present invention is to provide a rotating electrical machine in which a plurality of rotors rotate relative to the same stator, a Landel type rotor having field windings and 12 to 24 poles, and the rotor A stator iron core provided at a portion facing the outer periphery of the stator, and a stator coil composed of a stator coil wound around the stator iron core. The stator iron core is annularly wound around the outer peripheral side of the child, and the stator core has stator claw magnetic poles alternately extending from both sides in the axial direction at portions facing the rotor, and is formed with a recess. It is composed of two stator core constituent members having the same shape, and a nonmagnetic material having convex portions formed on both sides is provided between the stators, and the concave portions and the convex portions are fitted, This is achieved by configuring the stator to have a predetermined electrical angle.

An object of the present invention is to provide a rotating electrical machine in which a rotor rotates relative to a plurality of identical stators, a Landel type rotor having a field winding and a plurality of rotor claw magnetic poles, A stator iron core provided at a portion facing the outer periphery, and a stator coil composed of a stator coil wound in the stator iron core, wherein the stator coil comprises the rotor The stator iron core has a stator claw magnetic pole that alternately extends from both sides in the axial direction at a portion facing the rotor, and is substantially the same in which a recess is formed. It is composed of two stator core constituent members having a shape, and a nonmagnetic material having convex portions formed on both sides is provided between the stators, the concave portions and the convex portions are fitted, The stator is configured to form a predetermined electrical angle, and the width of the gap between the stator claw magnetic poles / the fixed It is achieved by that the width of the substantially axial center position of the claw poles is 0.05 to 0.3.

  In the rotating electrical machine of the present invention, the stator winding can be easily wound because the stator winding is wound in an annular shape. Further, since the rotor has field windings, the field magnetic flux can be changed.

[First embodiment]
An automotive alternator that is an embodiment of a rotating electrical machine of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of an AC generator for a vehicle. FIG. 2 is a perspective view partially showing a cross-section of the vehicle alternator. FIG. 3 is a perspective view in which the rotor and the stator are partially sectioned. FIG. 4 is a perspective view of the rotor. FIG. 5A is a perspective view in which only the stator is partially sectioned. FIG.5 (b) is the figure which looked at the stator from the inner peripheral side. FIG. 6 is a perspective view for each phase of the stator. FIG. 7A is a perspective view of one phase extracted from the stator, and FIG.
(B) is the perspective view for every components of Fig.7 (a).

  The vehicle alternator of this embodiment shown in FIG. 1 has a front bracket 1 arranged on the left side in FIG. 1 and a rear bracket 2 arranged on the left side in FIG. Although it has a bottomed cylindrical shape having an accommodation space inside, that is, a bowl shape, air flows through the inner peripheral side and the outer peripheral side of these front bracket 1 and rear bracket 2 as shown in FIG. A plurality of air holes 3 for opening are opened.

  The thickness of the outer peripheral side portion of the front bracket 1 in the radial direction has a relationship of A> B, where the rear bracket 2 side is the thickness A and the bottom surface side is the thickness B. In addition, a fitting portion 1a including an annular step in which the rear bracket 2 can be fitted is formed on the outer periphery of the end portion on the rear bracket 2 side. Furthermore, the thickness C of the axial end surface side portion of the front bracket 1 has a relationship of thickness A> thickness C> thickness B.

  Further, in the radial outer peripheral portion of the rear bracket 2, as in the case of the front bracket 1, the thickness D on the front bracket 1 side is smaller than the thickness E on the bottom portion side. A fitting portion 2a formed of an annular step that can be fitted with the step portion 1a of the front bracket 1 is formed on the periphery. The thick E portion of the rear bracket 2 is thicker than the thickness B of the front bracket 1.

  In addition, the front bracket 1 and the rear bracket 2 are each integrally provided with a fixing portion 4 having a fixing hole that protrudes radially outward, and these fixing portions 4 are attached to the vehicle by bolts (not shown). It is attached. The front bracket 1 and the rear bracket 2 are formed of an aluminum alloy, and die casting is used as a forming method.

  A rear cover 5 thinner than each bracket is attached to the end of the rear bracket 2 in the axial direction. The rear cover 5 has a bottomed cylindrical shape having a housing space inside, that is, a bowl shape, like each bracket. Presents. A plurality of air holes 3 through which air flows also in the rear cover 5 are opened on the inner peripheral side and the outer peripheral side. A terminal 6 connected to the battery is attached to the outer peripheral side of the rear cover 5. The rear cover 5 is made of resin or aluminum alloy.

  Ball bearings 7a and 7b as bearings are respectively attached to the substantially central positions in the radial direction at the axially outer ends of the front bracket 1 and the rear bracket 2, but the ball bearings 7a attached to the front bracket 1 are A ball bearing having a larger outer diameter than the ball bearing 7b attached to the rear bracket 2 is used.

  A shaft 8 is inserted through the inner rings of these ball bearings 7 a and 7 b, and the shaft 8 is supported so as to be rotatable relative to the front bracket 1 and the rear bracket 2.

  A pulley 9 as a rotation transmitting member is fixed to the end of the shaft 8 on the side of the front bracket 1 so as to rotate integrally with a bolt, and a crank to which rotation of the engine (not shown) is transmitted is connected to the pulley 9. The rotation is transmitted from the pulley by a belt as an endless transmission band. For this reason, the shaft 8 rotates in proportion to the rotational speed of the engine and the pulley ratio of the pulley 9 and the crank pulley.

  Further, two slip rings 10 are attached to the end of the shaft 8 on the rear bracket 2 side so as to rotate integrally with the shaft 8, and two brushes that slide while being pressed against the respective slip rings 10. 11 is supplied with electric power.

A front-side rotor member 12F and a rear-side rotor member 12R formed of a magnetic material are serration-coupled to each other so as to rotate integrally with the shaft 8 at a substantially central portion in the rotation axis direction of the shaft 8, The front-side rotor member 12F and the rear-side rotor member 12R have annular shapes in which the outer ends of the respective rotor members 12F and 12R are formed on the shaft 8 so that the movement in the axial direction is restricted in a state where they are in contact with each other in the axial direction. Plastic flow is made in the groove 8a. Thus, the rotor 12 as a rotor is constituted by the front side rotor member 12F and the rear side rotor member 12R fixed to the shaft 8.

  Plate-like fans 13F and 13R serving as ventilation means having a plurality of blades on the outer peripheral side are attached to both end faces in the rotation axis direction of the rotor 12, and rotate integrally with the rotor 12. These fans 13F and 13R are configured to circulate air from the inner peripheral side to the outer peripheral side by centrifugal force caused by rotation. The front fan 13F on the front bracket 1 side has smaller blades than the rear fan 13R on the rear bracket 2 side, and the flow rate of air to be circulated is smaller than that on the rear fan 13R.

  The front-side rotor member 12F and the rear-side rotor member 12R are composed of a shaft portion 12a located on the inner circumferential side and a plurality of rotor claw magnetic poles 12b having a L-shaped radial cross section located on the outer circumferential side. The Landel iron core is configured by the axial ends of the shaft portions 12a of the members 12F and 12R facing each other and contacting each other. A field winding 14 is wound around the rotating shaft between the outer periphery of the shaft portion 12a and the inner periphery of the rotor claw magnetic pole 12b, and both ends of the field winding 14 extend along the shaft 8 to extend as described above. Each is connected to a slip ring 10. For this reason, the direct current supplied from the brush 11 via the slip ring 10 flows through the field winding 14, and the rotor 12 is magnetized accordingly, and the magnetic path to the rotor 12 so as to go around the field winding 14. Is formed. The current supplied to the field winding 14 is controlled according to the state of the battery so as to start power generation when the power generation voltage becomes higher than the battery voltage of the vehicle, but the power generation voltage is adjusted. An IC regulator (not shown) as a voltage control circuit for this purpose is incorporated in a rectifier circuit 15 (to be described later) disposed inside the rear cover 5 and controls so that the terminal voltage of the terminal 6 is always a constant voltage.

  Further, the steps 16F and 16R provided between the thickness A portion and the thickness B portion of the front bracket 1 and between the thickness D portion and the thickness E portion of the rear bracket 2 A three-phase stator 17 arranged in the order of the U phase, the V phase, and the W phase from the front bracket 1 side is sandwiched and fixed. The U-phase stator 17U and the V-phase stator 17V are all housed in the inner periphery of the front bracket 1, and the W-phase stator 17W is partially in the inner periphery of the front bracket 1. Since the other parts are accommodated in the inner periphery of the rear bracket 2, the contact area with the front bracket 1 is larger than the contact area with the rear bracket 2 as a whole of the stator 17. A non-magnetic connecting plate 18 is provided between the phases of the stator 17 and is insulated by the connecting plate 18. Thus, the stator 17 is opposed to the outer periphery of the rotor claw magnetic pole 12b of the rotor 12 through a slight gap.

  One phase of the stator 17 is composed of a stator core 17a made of a magnetic material, and a stator winding 17b wound inside the stator core 17a in a circumferential direction along the stator core 17a. The stator winding 17b in each phase is connected to a rectifier circuit 15 mounted in the rear cover 5. Further, the rectifier circuit 15 is connected to the battery via the terminal 6.

  The rectifier circuit 15 is composed of a plurality of diodes. Since these diodes constitute independent three-phase coils, the rectifier circuit 15 is configured to perform full-wave rectification with six diodes.

Next, based on FIG.3 and FIG.4, the detail of the rotor 12 as a rotor is demonstrated. As shown in FIG. 3, the front-side rotor member 12F and the rear-side rotor member 12R constituting the rotor 12 have a plurality of rotor claw magnetic poles 12b having a L-shaped radial section from the axially outer end of the shaft portion 12a in the circumferential direction. More specifically, eight each are provided, and the rotor claw magnetic poles 12b extending from the front rotor member 12F and the rear rotor member 12R are alternately arranged in the circumferential direction. When all are combined, it is composed of 16 rotor claw magnetic poles 12b. That is, the number of magnetic poles of the rotor 12 in this embodiment is 16 poles.

  These rotor claw magnetic poles 12b are arranged in the circumferential direction of the intermediate portion 12b-2 facing the field winding 14 from the circumferential width A 'of the root portion 12b-1 located in the shaft portion 12a as shown in FIG. The width B ′ is smaller, and the circumferential width C ′ of the tip end portion 12 b-3 is smaller than the circumferential width B ′ of the intermediate portion 12 b-2 facing the field winding 14. That is, the relationship of A ′> B ′> C ′ is established.

  Further, the root portion 12b-1 is narrowed toward the field winding 14 at a substantially intermediate position that is a predetermined position in the axial direction within a range corresponding to the shaft portion 12a. 4 is provided from a substantially intermediate position, which is a predetermined position in the radial range of the rotor claw magnetic pole 12b, and further on the axial end side of the rotor 12 at the root portion 12b-1, from the outer peripheral side to the inner peripheral side. An inclined portion 12b-6 that is inclined so as to have a small diameter is provided. The intermediate portion 12b-2 extends in the axial direction from the narrow portion of the first taper portion 12b-4, and the radial width of the rotor claw magnetic pole 12b is as shown in FIG. The inner peripheral side is inclined so as to become narrower toward the front.

Further, the tip end portion 12b-3 is also provided with a second taper portion 12b-5 that becomes narrower toward the tip end, and between the first taper portion 12b-4 and the second taper portion 12b-5 in the axial direction. The intermediate portion 12b-2 having substantially the same width extends. The intermediate portion 12b-2 is provided in a range substantially facing the field winding 14, and the taper angles of the first taper portion 12b-4 and the second taper portion 12b-5 are substantially the same angle. Yes. For this reason, the gap formed between the rotor claw magnetic poles 12b has substantially the same width. Although not shown, wide chamfering may be applied to the counter-rotation direction side edge of the rotor claw magnetic pole 12b.

  The front-side rotor member 12F and the rear-side rotor member 12R formed in this way are arranged so that the field windings 14 are arranged therebetween, and the rotor claw magnetic poles 12b are alternately positioned in the circumferential direction. 12a is fixed to the shaft 8 in a state where the ends are in contact with each other.

  A front fan 13F and a rear fan 13R are attached to the outer ends in the axial direction of the front rotor member 12F and the rear rotor member 12R, respectively, by welding or the like. The front fan 13F and the rear fan 13R have a symmetrical fan arrangement so that air is circulated in the central direction by the rotation of the rotor 12. The front fan 13F will be described as an example. One side in the circumferential direction of the projection portion of the metal plate on which a plurality of projections are formed in the circumferential direction is bent by a press in a substantially arc shape and substantially perpendicular to the radial direction. A blade having an inclined surface that is inclined is integrally formed. The front fan 13F and the rear fan 13R thus molded are integrally fixed to the outer ends in the axial direction of the front rotor member 12F and the rear rotor member 12R by welding or the like. As described above, the front fan 13F, the rear fan 13R, and the rotor 12 as a rotor constitute a ventilation means.

  Next, details of the stator 17 will be described with reference to FIGS. 3, 5, 6 and 7. As described above, the stator 17 is configured in three phases of the U phase, the V phase, and the W phase. As shown in FIG. 6, the stator 17 is a ring formed of a resin material that is a nonmagnetic material. Specifically, it is integrated in the axial direction via a disk-shaped connecting plate 18. Note that four convex portions 181 are provided on each side surface of the connecting plate 18 at equal intervals in the circumferential direction. The convex portion 181 on one side and the convex portion 181 on the other side are each in the circumferential direction. In FIG. 4, the lens is provided at a position shifted by 45 degrees so as to be located at an intermediate position. Furthermore, the concave portions 171 into which these convex portions 181 can be fitted are provided on both side surfaces of the stator core 17a, and by combining them, the respective phases become the pitch of the rotor 12 as shown in FIG. In addition, the positioning is performed with the electrical angle shifted by 120 degrees.

  Next, a single stator will be described with reference to FIG. 7 by taking a U-phase stator 17U as an example. The stator 17U is composed of a stator core 17a and a stator winding 17b. FIG. As shown, the stator core 17a is divided into two parts in the axial direction. Each of the divided stator core constituent members 17a ′ and 17a ″ includes an annular outer peripheral portion 17a-1 having an L-shaped radial cross section provided on the outer peripheral side, and an inner peripheral side of the outer peripheral portion 17a-1. , Specifically, eight stator claw magnetic poles 17a-2 having an L-shaped cross section in the radial direction. As a whole, the radial cross section has a U-shape. Further, the stator claw magnetic pole 17a-2 has a circumferential side surface inclined with respect to the rotation axis. That is, since the skew is set, it is formed in a substantially trapezoidal shape so as to have a tapered shape.

  Further, four pairs of convex portions 172 and concave portions 173 are provided on the opposing surfaces of the respective stator core constituent members 17a ′ and 17a ″, and these convex portions 172 are formed on the stator claw magnetic poles. 17a-2 is provided in a substantially middle portion in the circumferential direction, and the recess 173 is provided in a substantially middle portion in the circumferential direction between adjacent stator claw magnetic poles 17a-2. Accordingly, the stator claw magnetic poles 17a-2 are alternately arranged in the circumferential direction, and the stator iron core 17a having a total of 16 stator claw magnetic poles 17a-2 shifted by 180 degrees in electrical angle is configured. The number of magnetic poles for one phase of the stator 17 in the embodiment is 16 poles, which is the same as the number of magnetic poles of the rotor 12.

  The stator core constituent members 17a ′ and 17a ″ and the stator cores 17a of the respective phases are connected and fixed by a resin filled in a gap formed between the stator claw magnetic poles 17a-2. Is substantially the same surface as the inner surface of the stator claw magnetic pole 17a-2 In this way, the stator core 17a of each phase is coupled by the resin filled between the stator claw magnetic poles 17a-2. Therefore, the position on the inner peripheral side of the connecting plate 18 contacts within the range of the side surface of the outer peripheral portion 17a-1, and does not contact the side surface of the stator claw magnetic pole 17a-2. The resin is continuously filled from the gap between the stator claw magnetic poles 17a-2 in one phase to the gap between the stator claw magnetic poles 17a-2 in the other phase.

  The stator core constituent members 17a ′ and 17a ″ are formed by filling an insulating iron powder into a mold and compressing it, and further subjected to magnetic annealing. The so-called powder iron core makes it difficult to generate eddy currents and can reduce eddy current loss. The stator core constituent members 17a ′ and 17a ″ are formed in substantially the same shape. There is no need to prepare separate molds.

  In the stator core 17a, the stator winding 17b is wound in the circumferential direction and annularly along the outer peripheral portion 17a-1. The surface of the stator winding 17b is coated with an insulating coating such as varnish, and the end of the stator winding 17b is sewed between the stator claw magnetic poles 17a-2 of the stator core 17a. It is connected to the terminal 15a of the circuit 15. In addition, you may make it arrange | position the insulating paper which is an insulating member between the stator core 17a and the stator coil | winding 17b.

  In the present embodiment, the stator 17 is configured so that all phases are the same, and as described above, a non-magnetic connecting plate 18 is provided between the phases while being shifted by 120 degrees in electrical angle. And the resin is filled between the stator claw magnetic poles 17a-2 so that the phases do not move.

  Next, the operation of this embodiment will be described.

First, rotation is transmitted from the crankshaft to the pulley 9 via the belt as the engine starts, so the rotor 12 as the rotor is rotated via the shaft 8. Here, when a direct current is supplied from the brush 11 to the field winding 14 provided in the rotor 12 via the slip ring 10, magnetic flux around the inner and outer circumferences of the field winding 14 is generated. N poles or S poles are alternately formed in the circumferential direction on the magnetic pole 12b. The magnetic flux generated by the field winding 14 passes through the stator claw magnetic pole 17a-2 extending from one side in the axial direction of the stator 17 from the N-pole rotor claw magnetic pole 12b of the front rotor member 12F. It goes around and reaches the stator claw magnetic pole 17a-2 extending from the other side in the axial direction. Further, when this magnetic flux reaches the rotor claw magnetic pole 12b of the S pole of the rear rotor member 12R, a magnetic circuit that circulates around the rotor 12 and the stator 17 is formed. Since the magnetic flux generated in the rotor is linked to the stator winding 17b in this way, an AC induced voltage is generated in each of the U-phase, V-phase, and W-phase stator windings 17b, and the total 3 A phase AC induced voltage is generated.

  The AC voltage thus generated is full-wave rectified by the rectifier circuit 15 and converted into a DC voltage. The rectified DC voltage is achieved by controlling the current supplied to the field winding 14 with an IC regulator (not shown) so that it becomes a constant voltage of about 14.3V.

  Further, when the rotor 12 rotates, the front fan 13F and the rear fan 13R also rotate together with the rotor 12, so that external air is taken in from the axial direction on the inner peripheral side as shown by the broken line arrows in FIG. The flow of air discharged in the outer peripheral direction is formed.

  The front fan 12F rotates to suck outside air in the axial direction from the air hole 3 on the inner peripheral side provided in the outer peripheral portion of the ball bearing 7a in the front bracket 1, and the sucked air is sucked into the front fan 12F. It flows to the outer peripheral side due to the centrifugal force generated by the blades, and is discharged from the air hole 3 on the outer peripheral side provided in the thick part on the outer peripheral side of the front bracket 1. Here, since one axial side surface and the outer peripheral surface of the stator 17 are fixed in contact with the front bracket 1, heat generated in the stator 17 is sufficiently transmitted to the front bracket 1. Since the location where the heat of the bracket 1 is transmitted faces the location where air flows toward the air hole 3 on the outer peripheral side, the stator 17 can be cooled.

  By rotating the rear fan 12R, the air hole 3 provided in the outer peripheral side edge portion of the rear cover 5 and the air hole on the inner peripheral side opened in the axial end surface of the rear cover 5 (not shown) are connected via the rectifier circuit 15. The outside air is sucked in the axial direction from the air hole 3 on the inner peripheral side provided in the outer peripheral portion of the ball bearing 7b in the rear bracket 2, and the sucked air is moved to the outer peripheral side by the centrifugal force generated by the blades of the rear fan 12R. It flows and is discharged from the air hole 3 on the outer peripheral side provided on the outer peripheral side of the rear bracket 2. For this reason, the heat generated from the stator 17 as in the front bracket 1 and the heat of the stator 17 transmitted to the rear bracket 2 are cooled by the air flowing toward the air holes 3 on the outer peripheral side.

  Furthermore, air flows through the gap between the magnetic poles of the rotor 12 and the gap between the rotor 12 and the stator 17 due to the pressure difference between the pressure of the front fan 13F and the pressure of the rear fan 13R that occurs when rotating. In the present embodiment, since the pressure generated in the rear fan 13R increases, air flows from the front bracket 1 side to the rear bracket side through the gap between the rotor 12 and the stator 17 and between the rotor 12 magnetic poles, The rotor 12 and the stator 17 are cooled.

  The configuration of the first embodiment has been described above. The operational effects of the first embodiment are described below.

  According to the first embodiment, the rotor is a rotating electrical machine in which the rotor rotates relative to the stator, and the rotor includes a field winding wound around the rotation axis, and the field winding. The rotor core is provided so as to surround and has a rotor claw magnetic pole at a portion facing the claw magnetic pole of the stator core, and the stator is annularly wound around the outer periphery of the rotor A stator winding and a stator claw magnetic pole extending alternately from both sides in the axial direction at a portion facing the rotor, and provided so as to surround the periphery of the stator winding It consists of an iron core. In this way, since the stator winding only has to be wound around the outer periphery of the rotor in a ring shape, the workability is greatly improved, the space factor is improved, and the coil end is eliminated, thereby reducing the winding resistance. It is possible to reduce.

  Moreover, since the rotor has a field winding, the field magnetic flux can be changed according to the application.

  Further, according to the present embodiment, since the stator claw magnetic pole is skewed with respect to the axial line, the magnetic flux generated in the rotor can be smoothly interlinked and the magnetic noise can be reduced. it can.

  In addition, according to the present embodiment, it is characterized in that the circumferential width of at least a portion of the rotor claw magnetic pole facing the field winding is constant. For this reason, compared with the case where the rotor claw magnetic pole is tapered in the circumferential direction, the magnetic flux generated by the field winding can be easily linked, so that the induced voltage can be increased. .

  Further, according to the present embodiment, the root part of the rotor claw magnetic pole is formed wider than the intermediate part, the intermediate part is formed wider than the tip part, and the intermediate part has a substantially constant width. Is formed. When the intermediate part is made almost constant so that the area facing the stator of each phase aligned in the axial direction does not change greatly, magnetic saturation is likely to occur at the root part, but the root part is wide. Magnetic saturation can be relaxed and the amount of magnetic flux can be increased. In addition, when only the base part is wide, the gap between adjacent rotor claw magnetic poles becomes narrow, so that magnetic flux is likely to leak, but the tip part is narrower than the intermediate part corresponding to the base part. Therefore, a sufficient gap between adjacent rotor claw magnetic poles can be secured.

  In addition, according to the present embodiment, the rotor is a rotating electrical machine in which the rotor rotates relative to the stator, the Landel rotor having a field winding and 16 poles, and the outer periphery of the rotor. And a stator composed of a stator winding that is wound in the stator core, and the stator winding is a part of the rotor. The stator iron core has 16-pole stator claw magnetic poles that alternately extend from both sides in the axial direction at a portion facing the rotor, while being wound in an annular shape on the outer peripheral side. The more the number of magnetic poles, the higher the induced voltage can be increased. However, if the number of magnetic poles of the rotor is increased too much, the magnetic poles will be close to each other and the leakage flux will increase, resulting in an increase in inductance and iron loss. As a result, the output and efficiency are lowered. Therefore, the applicant has found that the number of poles of the rotor that can increase the output and efficiency as a rotating electric machine is 12 to 24 poles. It was also found that the induced voltage output can be improved by balancing the number of magnetic poles of the stator with the number of magnetic poles of the rotor to 12-24. Further, when the rotor is a Landel type, there is a problem that the rotor claw magnetic pole is deformed by centrifugal force. However, when the number of poles of the rotor is 24, deformation of the rotor claw magnetic pole is a problem. It turns out that it is not. In order to further improve the output, it has been found that the number of poles of the rotor should be 16 to 24. In particular, the output could be improved most by using 16 poles. Also, the number of magnetic poles of the stator showed the same tendency as the number of magnetic poles of the rotor, and it was found that the number of poles should be 16 to 24. In particular, the output could be improved most by setting the number of magnetic poles of the stator to 16 as in the case of the number of magnetic poles of the rotor. Based on such a result, in this embodiment, the number of magnetic poles of the rotor and the number of magnetic poles of the stator are 16 poles.

  Further, according to the present embodiment, the thickness of the outer peripheral side portion of the front bracket in the radial direction is thin on the rear bracket side, thick on the bottom side, and the outer periphery of the end portion on the rear bracket side is rear. Since the bracket and the fitting part are fitted, the respective stators are arranged so that at least the outer circumference is in contact with the step provided on the thick part of the outer circumferential side portion of the front bracket and the rear bracket. Since the air hole through which air flows is provided in the thick wall portion to ensure the heat, the heat generated in the stator can be transmitted to the bracket, and the stator can be sufficiently cooled. Moreover, since the air from the ventilation means flows through the air holes, the cooling effect can be improved. Further, since the front bracket and the rear bracket are fitted by forming a fitting portion by a step provided on the outer periphery and a step provided on the inner periphery, heat exchange between the front bracket and the rear bracket can be sufficiently performed. In addition, since the stator comes into contact with the front bracket having a thick portion, the stator is easily cooled. In order to improve the cooling effect, cooling fins may be provided in the air holes.

  Further, according to the present embodiment, when the stator windings of the respective phases are connected to the rectifier circuit, since the gaps between the stator claw magnetic poles are passed, it is not necessary to make holes in the stator iron core. For this reason, it can be made cheap and it is possible not to affect the magnetic circuit. In addition, since the gap between the stator claw magnetic poles is filled with resin as a non-magnetic material, the stator winding can also be held, and the stators of each phase and the stator core components are fixed. You can also. Furthermore, the strength of the stator including the stator claw magnetic poles can be improved by this resin. In addition, since the resin and the stator claw magnetic poles are substantially flush with each other in this embodiment, wind noise caused by the rotation of the rotor can also be reduced. Note that the surface of the stator claw magnetic pole is not covered with resin, so that the gap with the rotor can be made smaller, so that the magnetic flux can be easily passed.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS. FIG. 8A shows the output waveform of the voltage induced in each phase in the first embodiment. FIG. 8B shows the output waveform of the voltage induced in each phase in the second embodiment. FIG. 9 is a perspective view in which the side surfaces of the rotor and the stator of the second embodiment are cross-sectioned. In addition, about the site | part which is common in 1st Example, it represents with the same name and the same code | symbol.

  As described above, in the stator 17 of the first embodiment, the U-phase, V-phase, and W-phase stator cores 17a are arranged adjacent to each other via the connecting plate 18. Even though the connecting plate 18 is interposed, the magnetic flux may leak to the stator core 17a of the adjacent phase. When the magnetic flux leaks to the adjacent stator core 17a in this way, the magnetic flux leaks to both sides of the V-phase stator core 17a arranged between the U phase and the W phase. ), The induced voltage output is smaller than that of the U phase and the W phase. For this reason, the DC voltage after rectification by the rectifier circuit cannot be increased.

  Therefore, in the second embodiment, as shown in FIG. 9, a permanent magnet 19 having a substantially rectangular cross section in the axial direction is provided in a portion of the V-phase stator 17V between the rotor claw magnetic poles 12b. The polarity of the permanent magnet 19 is magnetized so that the same polarity as the magnetic pole formed on the rotor claw magnetic pole 12b when facing the field winding 14 faces. For this reason, in the V-phase stator 17V, since the leakage magnetic flux between the rotor claw magnetic poles 12b is lower than that in the other phases, the induced voltage is increased, and as shown in FIG. It can be balanced with the induced voltage. Such a permanent magnet 19 constitutes a balance means, and a ferrite magnet is used as the magnet. The axial length of the permanent magnet 19 is preferably the same as the axial length of the V-phase stator 17V, but it is not necessary to be completely the same as the axial length of the V-phase stator 17V. It is only necessary that the balance of the V-phase stator 17V is maintained with respect to the U-phase stator 17U and the W-phase stator 17W.

  Thus, in the second embodiment, since there is a balance means for balancing the voltage induced in the phase other than the phases arranged at both ends in the axial direction with the voltage induced in the other phase, The induced voltage is balanced, and the induced voltage that is output along with it can be increased.

  In addition, since the balancing means of the second embodiment is a means for increasing the voltage induced in the phases other than the phases arranged at both ends in the axial direction, the induced voltage in the U phase and the W phase is reduced to reduce the V phase. The induced voltage as a whole can be increased rather than balancing.

  Further, the balance means of the second embodiment is composed of at least permanent magnets provided between the rotor claw magnetic poles and facing the phases other than the phases arranged at both ends in the axial direction. And the balance function can be given without greatly changing the shape of the stator.

  In addition, since the permanent magnet of the second embodiment is provided only in a portion facing a phase other than the phases arranged at both ends in the axial direction, the balance means can be configured by a simple-shaped permanent magnet. For this reason, a balance means can be comprised at low cost.

[Third embodiment]
Next, a third embodiment will be described with reference to FIG. FIG. 10 is a perspective view in which the side surfaces of the rotor and the stator of the third embodiment are cross-sectioned. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  The third embodiment is different from the second embodiment in the shape of the permanent magnet 19, but the other parts are almost the same as those of the second embodiment. In the permanent magnet 19 of the third embodiment, the portion corresponding to the V-phase stator 17V is thick and the portions corresponding to the U-phase stator 17U and the W-phase stator 17W so that the axial cross section is substantially T-shaped. Is thin.

  For this reason, in the V-phase stator 17V, the leakage magnetic flux between the rotor claw magnetic poles 12b is lower than in the other phases, and the leakage magnetic flux is larger than that in the V-phase stator 17V, but the U-phase stator 17U and W Since the leakage magnetic flux can be reduced also in the phase stator 17W, the induced voltages of all the phases can be increased and the induced voltages of the respective phases can be balanced.

  As described above, in the permanent magnet of the third embodiment, the magnetic force of the portion facing the phase other than the phase disposed at both ends in the axial direction is stronger than the magnetic force of the portion facing the phases disposed at both ends in the axial direction. Since it comprised, it can increase, balancing the induced voltage of each phase. Specifically, since the permanent magnets are configured so that both axial ends are thin, even if only one permanent magnet is arranged between each rotor claw magnetic pole, the induced voltage is balanced and increased. An effect can be obtained.

[Fourth embodiment]
Next, a fourth embodiment will be described with reference to FIG. FIG. 11 is a perspective view in which the side surfaces of the rotor and the stator of the fourth embodiment are cross-sectioned. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the third embodiment, the shape of the permanent magnet 19 is different from that of the third embodiment, but the other parts are almost the same as those of the third embodiment. The permanent magnet 19 of the fourth embodiment has a substantially trapezoidal shape in which the cross section in the axial direction becomes wider toward the outer peripheral side, and the portion corresponding to the V-phase stator 17V is an inner peripheral short side of the trapezoid. The width in the axial direction is increased in a tapered manner so as to continuously increase from the short side on the inner peripheral side toward the outer peripheral side. For this reason, permanent magnet 19 is thinner at the portions corresponding to U-phase stator 17U and W-phase stator 17W than at the portion corresponding to V-phase stator 17V.

  For this reason, as in the third embodiment, the V-phase stator 17V has a lower leakage flux between the rotor claw magnetic poles 12b than the other phases, and also leaks in the U-phase stator 17U and the W-phase stator 17W. Magnetic flux can be reduced. Furthermore, in the fourth embodiment, the thickness of the permanent magnet 19 is set in accordance with the amount of leakage magnetic flux, and the leakage magnetic flux is more balanced than in the third embodiment while balancing the induced voltage. The amount of can be reduced. Further, since there is no portion where the permanent magnet 19 suddenly becomes thin, the strength of the permanent magnet 19 can be improved.

[Fifth embodiment]
Next, a fifth embodiment will be described with reference to FIG. FIG. 12 is a side sectional view of the rotor and stator of the fifth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  Unlike the second and third embodiments, the fifth embodiment does not constitute a balancing means by providing a permanent magnet 19 between the rotor claw magnetic poles, but fixes the V-phase stator 17V. The axial length A ″ of the core 16a is made longer than the axial length B ″ of the stator core 17a of the U-phase stator 17U and the W-phase stator 17W to fix the U-phase stator 17U and the W-phase stator 17W. The magnetic flux passing between the stator core 17a of the V-phase stator 17V and the rotor 12 is easier to flow than the magnetic flux passing between the core 16a and the rotor 12 as a rotor, thereby constituting a balance means. It is a thing. The stator core 17a of the V-phase stator 17V is not only longer in the axial direction than the U-phase stator 17U and the W-phase stator 17W, but the length of the stator claw magnetic pole 17a-2 is also U-phase fixed. It is longer than the child 17U and the W-phase stator 17W.

  In this way, the fifth embodiment makes it easier for the magnetic flux passing between the other phases and the rotor to pass through than the magnetic flux passing between the phases arranged at both ends in the axial direction and the rotor. Since the balancing means is provided, the induced voltages of all phases can be balanced.

  In particular, since the balance means of the fifth embodiment is configured by making the axial length of the other stator cores longer than the stator cores disposed at both ends in the axial direction, a new member is added. Without this, the induced voltage of each phase can be balanced.

[Sixth embodiment]
Next, a sixth embodiment will be described with reference to FIG. FIG. 13 is a side cross-sectional view of the rotor and stator of the sixth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the sixth embodiment, the number of turns of the stator winding 17b in the V phase is larger than the number of turns of the stator winding 17b in the U phase and the W phase, thereby constituting the balancing means. For this reason, the stator core 17a of V phase can be wound with more stator windings 17b than the U phase and W phase, but the other parts are almost the same as in the first embodiment. Therefore, the description is omitted.

  As described above, the balance means of the sixth embodiment increases the number of turns of the stator windings in the other phases than the stator windings of the phases arranged at both ends in the axial direction. The induced voltage of each phase can be balanced while reducing. Although only the stator winding may be changed without changing the stator core of each phase, in order to make the induced voltage to be output as large as possible, the stator winding in the stator core as shown in FIG. The annular space around which the wire is wound is preferably made larger in the V phase than in the U phase and the W phase, and the stator winding is wound around the annular space to the maximum extent.

[Seventh embodiment]
Next, a seventh embodiment will be described with reference to FIG. FIG. 14A is a perspective view in which the side surfaces of the rotor and the stator of the seventh embodiment are shown in cross section. FIG. 14B is a side sectional view of the rotor and the stator of the seventh embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the seventh embodiment, as shown in FIGS. 14A and 14B, the radial gap between the rotor claw magnetic pole 12b and the stator 17 of each phase is opposed to the V-phase stator 17V. The balance a is configured by widening the gap b at a position facing the U-phase stator 17U and the W-phase stator 17W. In order to constitute this balancing means, both end portions in the axial direction of all the rotor claw magnetic poles 12b facing the U-phase stator 17U and the W-phase stator 17W are cut out in a tapered shape. Since it is almost the same as that of the first embodiment, the description thereof is omitted. For this reason, although the shape of the outer peripheral surface of the rotor claw magnetic pole 12b is substantially trapezoidal, it may be a continuous convex shape or a stepped convex shape.

  As described above, the balance means of the seventh embodiment is configured so that the stator claw magnetic poles of the other stator cores and the rotation of the stator claw magnetic poles other than the stator claw magnetic poles of the stator iron core and the rotor arranged at both ends in the axial direction rotate. Magnetic flux is reduced by making the gap between the rotors smaller and reducing the magnetic resistance caused by the gap between the other phase and the rotor than the gap between the rotor and the phase arranged at both ends in the axial direction. Since it becomes easy to pass, the induced voltage of all the phases can be balanced. In addition, since the balance means can be configured simply by processing the conventional rotor claw magnetic poles, the number of parts does not increase and there is no need to redesign. In particular, if the outer peripheral surface of the rotor claw magnetic pole is tapered or has a continuous convex shape, no step is formed on the rotor claw magnetic pole, so that the strength can be maintained even if centrifugal force is applied.

[Eighth embodiment]
Next, an eighth embodiment will be described with reference to FIG. FIG. 15A is a perspective view in which the side surfaces of the rotor and the stator of the eighth embodiment are shown in cross section. FIG. 15B is a side sectional view of the rotor and the stator of the eighth embodiment. FIG. 15C is a diagram illustrating an example of the connection of the stator windings in the eighth embodiment. FIG. 15D is a diagram illustrating an example of the connection of the stator windings in the eighth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the eighth embodiment, a pair of U-phase, V-phase, and W-phase stators 17 is provided. That is, as shown in FIGS. 15 (a) and 15 (b), the first U-phase stator 17U1, the first V-phase stator 17V1, the first W-phase stator 17W1, the second U-phase stator 17U2, from one axial end side. Six stators 17 are arranged via the connecting plate 18 in the order of the second V-phase stator 17V2 and the second W-phase stator 17W2. The stator windings 17b having the same phase in these stators 17 are connected in series as shown in FIGS. 15 (c) and 15 (d), and the respective phases are shown in FIG. 15 (c). It may be connected so as to be a star connection as shown in FIG. 15 or may be connected so as to be a Δ connection as shown in FIG. In the eighth embodiment, the balancing means is configured in this way.

As described above, the induced voltage is higher in the other stators than in the stators arranged at both ends in the axial direction, and in particular, a plurality of stators are adjacent to each other than one stator is adjacent to each other. The magnetic flux leakage is larger when it is matched. For this reason, since the first U-phase stator 17U1 and the second W-phase stator 17W2 are positioned at the axial ends, the induced voltage is the largest, and then the first V-phase stator 17V1 and the second V-phase stator 17V2 Has only one adjacent stator 17 on one end side, and a plurality of stators 17 are arranged on the other end side. Therefore, an induced voltage is higher than that of the first U-phase stator 17U1 and the second W-phase stator 17W2. Becomes smaller. In addition, since the first W-phase stator 17W1 and the second U-phase stator 17U2 have a plurality of stators 17 disposed at both ends, the first V-phase stator 17
The induced voltage becomes smaller than V1 and the second V-phase stator 17V2. Thus, the induced voltage of each phase is in the relationship of 1st U phase = 2nd W phase> 1st V phase = 2nd V phase> 1st W phase = 2nd U phase, and by connecting the same phase in series, the induced voltage of each phase Can be balanced.

  As described above, the balance means of the eighth embodiment is provided with a plurality of stator phases, and is arranged so that the same phases are in the same order from one end in the axial direction. Since the wires are connected in series, the voltage induced in the stator winding of each phase is not balanced by lowering the voltage induced in the stator winding of some phases. It is possible to balance the overall size. In the eighth embodiment, a permanent magnet having the same thickness as that of the second to fourth embodiments is provided over the entire range facing the stator between the rotor claw magnetic poles, or the stator. By further reducing the gap between the inner peripheral surface of the iron core and the outer peripheral surface of the rotor claw magnetic pole, the induction voltage can be further improved.

[Ninth embodiment]
Next, a ninth embodiment will be described with reference to FIG. FIG. 16A is a side sectional view of the rotor and the stator of the ninth embodiment. FIG. 16B is a graph showing the relationship between the interphase gap ratio and the induced voltage. FIG. 16C is a graph showing the relationship between the interphase gap ratio and the voltage amplitude. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

In the ninth embodiment, as shown in FIG. 16 (a), the gap G1 between the respective phases in the axial direction of the stator 17 is made larger than that in the first embodiment to constitute the balance means. Instead, it is filled with resin. Thus, by increasing the gap G1 between the respective phases in the axial direction of the stator 17, the leakage magnetic flux between the respective phases can be reduced. However, since the axial length of the rotor 12 as the rotor is determined, If the gap G1 is too large, the axial length B1 of the stator 17 of each phase will be small.

For this reason, experiments as shown in FIGS. 16B and 16C are performed on the relationship between the interphase gap ratio (G1 / B1), which is the ratio of the gap G1 and the axial length B1 of the stator 17, and the induced voltage. went. FIG. 16B is a graph in which the horizontal axis represents the interphase gap ratio (G1 / B1), and the vertical axis represents the voltage value obtained by averaging the induced voltages for each phase. According to FIG. 16B, the required induced voltage can be satisfied when the interphase gap ratio (G1 / B1) is 0.2 or less. In the waveform of FIG. 16B, the induced voltage starts to decrease with the interphase gap ratio (G1 / B1) peaking at 0.13 to 0.15. As described above, the interphase gap ratio (G1 / B1) is
A satisfactory voltage can be induced at 0.2 or less, preferably 0.15 or less, and particularly preferably 0.13 or less.

However, if the interphase gap ratio (G1 / B1) is made too small, the induced voltage of the V phase is lowered as shown in FIG. 8A, so that the total voltage value of the induced voltages of each phase is lowered. There is. Here, FIG. 16C shows a graph in which the horizontal axis is the interphase gap ratio (G1 / B1), and the vertical axis is the amplitude of the voltage value obtained by summing the induced voltages of the respective phases. According to FIG. 16 (c), when the interphase gap ratio (G1 / B1) is 0.05 or less, the amplitude of the voltage value obtained by summing the induced voltages of the respective phases becomes large, and the interphase gap ratio (G1 / B1) If it is 0.05 or more, it can be set as the amplitude which can output a required induced voltage. Also, the interphase gap ratio
The amplitude begins to stabilize when (G1 / B1) exceeds 0.07, and the amplitude stabilizes when the interphase gap ratio (G1 / B1) is near 0.1.

As described above, the ninth embodiment can sufficiently output an induced voltage with a small amplitude by setting the interphase gap ratio (G1 / B1) to 0.05 to 0.2. Also, the interphase gap ratio (G1 /
If B1) is set to 0.07 to 0.15, the induced voltage can be increased. Further, the interphase gap ratio (G1 / B1) is preferably 0.1 to 0.13.

[Tenth embodiment]
Next, a tenth embodiment will be described with reference to FIG. FIG. 17A is a side sectional view of the rotor and the stator of the tenth embodiment. FIG. 17B is a view of the rotor of the tenth embodiment as viewed from the outer peripheral side. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the tenth embodiment, an insulating groove 20 having a rectangular cross section extending in the circumferential direction is provided on the outer peripheral surface of each rotor claw magnetic pole 12b in the rotor 12 as a rotor, and a non-magnetic material such as resin is provided in the insulating groove 20. Filling the body. The insulating groove 20 is opposed to the connecting plate 18 between the U-phase stator 17U and the V-phase stator 17V, and the connecting plate 18 between the V-phase stator 17V and the W-phase stator 17W. The connecting plate 18 is formed to be slightly wider than the thickness of the connecting plate 18. The other parts are almost the same as those in the first embodiment, and the description thereof will be omitted.

  In this way, the rotor claw magnetic pole 12b in the rotor 12 is provided with the insulating groove 20 at a position facing the stator 17 of each phase, so that leakage from the stator 17 to the other stator takes the surface of the rotor 12 as a path. Thus, the magnetic flux circulates around the field winding 14 from the stator 17 of each phase. For this reason, the balance of the induced voltage of each phase can be maintained. Therefore, the insulating groove 20 constitutes a balance means. Further, the insulating groove 20 can reduce eddy current generated on the surface of the rotor claw magnetic pole 12b, and has an effect of improving efficiency.

In the tenth embodiment, the insulating groove 20 is filled with a non-magnetic material. However, if the strength of the rotor claw magnetic pole 12b can be sufficiently ensured, the air can be filled even if nothing is filled in the insulating groove 20. However, since it becomes a substitute for the non-magnetic material, the leakage magnetic flux can be reduced, and the effect of being inexpensive can be obtained because the non-magnetic material is not filled.

[Eleventh embodiment]
Next, an eleventh embodiment will be described with reference to FIG. FIG. 18A is a side sectional view of the rotor and the stator of the eleventh embodiment. FIG. 18B is a diagram showing the arrangement of the rotor claw magnetic poles and the stator claw magnetic poles of the eleventh embodiment. FIG. 18C is another aspect diagram showing the arrangement of the rotor claw magnetic poles and the stator claw magnetic poles of the eleventh embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the eleventh embodiment, the rotor 12 as a rotor is divided into three corresponding to the U-phase stator 17U, the V-phase stator 17V, and the W-phase stator 17W. One of them is that the rotor 12 in the first embodiment is 1/3 in the axial direction, and the axial length of the rotor claw magnetic pole 12b is also about 1/3 that in the first embodiment. The number of turns of the field winding 14 is reduced. The rotor 12 is configured in a state where the three divided rotors 12U, 12V, and 12W configured as described above are adjacent to each other.

  As shown in FIG. 18 (b), the stator claw magnetic pole 17a-2 is similar to the first embodiment in that the U-phase stator 17U, the V-phase stator 17V, and the W-phase stator 17W have an electrical angle of 120 degrees in the circumferential direction. However, the rotor claw magnetic poles 12b are arranged in the same phase in which the divided rotors 12U, 12V, and 12W are not shifted by an electrical angle.

Since the rotor 12 is thus divided for each phase of the stator 17, the magnetic flux circulates in an independent state, and the induced voltage can be balanced. Therefore, the divided rotors 12U, 12V, and 12W constitute balance means.

In FIG. 18B, the stator claw magnetic poles 17a-2 of each phase are arranged in a state shifted by 120 degrees in electrical angle, and the rotor claw magnetic poles 12b of the divided rotors 12U, 12V, and 12W are shifted in electrical angle. However, as shown in FIG. 18C, the stator claw magnetic poles 17a-2 of each phase are arranged in a state where there is no deviation in electrical angle, and the divided rotors 12U, 12V, and 12W are rotated. You may arrange | position the claw magnetic pole 12b in the state which shifted | deviated 120 degree | times by the electrical angle.

[Twelfth embodiment]
Next, a twelfth embodiment will be described with reference to FIG. FIG. 19A is a diagram showing stator claw magnetic poles in the twelfth embodiment. FIG. 19B is a graph showing the relationship between the stator claw pole gap ratio and the induced voltage. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

As shown in FIG. 19 (b), the ratio between the gap Gs between the stator claw magnetic poles 17a-2 in the stator 17 and the circumferential width Bs at a substantially intermediate position in the axial direction of the stator claw magnetic poles 17a-2. It has been found that a change occurs in the induced voltage to be output by changing a gap ratio (Gs / Bs) between certain stator claws. In FIG. 19B, the skew angle of the stator claw magnetic pole 17a-2 is constant, and the rotor is not changed.

  According to FIG. 19B, the necessary induced voltage can be output by setting the gap ratio (Gs / Bs) between the stator claw magnetic poles to 0.05 to 0.3. In particular, the induced voltage peaks when the gap ratio between the stator claw poles (Gs / Bs) is about 0.15, and decreases even if the gap ratio between the stator claw poles (Gs / Bs) is increased from around 0.15. Even so, the induced voltage drops. Therefore, as is clear from FIG. 19B, a larger voltage can be induced by setting the gap ratio (Gs / Bs) between the stator claw poles to 0.1 to 0.2.

[Thirteenth embodiment]
Next, a thirteenth embodiment will be described with reference to FIG. FIG. 20A is a diagram showing rotor claw magnetic poles in the thirteenth embodiment. FIG. 20B is a graph showing the relationship between the rotor pawl magnetic pole gap ratio and the induced voltage. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  As shown in FIG. 20 (b), the gap Gr between the rotor claw magnetic poles 12b in the rotor 12 as the rotor and the circumferential direction of the intermediate portion 12b-2 that is a substantially intermediate position in the axial direction of the rotor claw magnetic pole 12b. It was found that by changing the gap between the rotor claw magnetic poles (Gr / Br), which is a ratio to the width Br, a change occurs in the output induced voltage. In FIG. 20B, the stator is not changed.

According to FIG. 20B, the necessary induced voltage can be output by setting the gap ratio (Gr / Br) between the rotor claw magnetic poles to 0.3 to 0.6. In particular, the induced voltage peaks when the rotor pawl magnetic pole gap ratio (Gr / Br) is around 0.4, and decreases even if the rotor pawl magnetic pole gap ratio (Gr / Br) is increased from around 0.4. Even so, the induced voltage drops. Therefore, as apparent from FIG. 20B, a larger voltage can be induced by setting the rotor pawl magnetic pole gap ratio (Gr / Br) to 0.35 to 0.45.

In the thirteenth embodiment, the rotor claw magnetic pole gap ratio (Gr /
The induced voltage was measured by changing Br). Even if the gap ratio between the stator claw magnetic poles (Gs / Bs) was changed as in the twelfth embodiment, the gap ratio between the rotor claw magnetic poles (Gr / The tendency of Br) and induced voltage is almost the same. For this reason, even if the stator is changed, the induced voltage can be improved by setting the rotor pawl magnetic pole gap ratio (Gr / Br) within the above numerical range. The same applies to the twelfth embodiment, and even if the rotor claw magnetic pole gap ratio (Gr / Br) is changed, the stator claw magnetic pole gap ratio (Gs / Bs) and the induced voltage tend to change little. . From the above, the induced voltage can be improved more when both the twelfth embodiment and the thirteenth embodiment are satisfied.

[14th embodiment]
Next, a fourteenth embodiment will be described with reference to FIG. FIG. 21A is a diagram showing stator claw magnetic poles in the fourteenth embodiment. FIG. 21B is a graph showing the relationship between the skew angle of the stator claw magnetic pole and the induced voltage. FIG. 21C is a graph showing the relationship between the skew angle of the stator claw magnetic pole and the voltage amplitude. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  As shown in FIG. 21 (b), it was found that changing the skew angle θ1 of the stator claw magnetic pole 17a-2 in the stator 17 causes a change in the output induced voltage. In FIG. 21B, the circumferential width Bs of the stator claw magnetic pole 17a-2 and the gap Gs between the stator claw magnetic poles 17a-2 are constant, and the rotor is not changed.

  According to FIG. 21B, the necessary induced voltage can be output by setting the skew angle θ1 of the stator claw magnetic pole 17a-2 to 5 degrees or more. In particular, the induced voltage starts to decrease when the skew angle θ1 is 15 degrees or less. Further, according to FIG. 21 (c), when the skew angle θ1 of the stator claw magnetic pole 17a-2 is 20 degrees or more, the voltage amplitude becomes too large to output a necessary induced voltage. From the above, it is possible to output a necessary induced voltage by setting the skew angle θ1 of the stator claw magnetic pole 17a-2 to 5 degrees to 20 degrees, and particularly when the skew angle θ1 is set to 15 degrees to 20 degrees. Good.

[Fifteenth embodiment]
Next, a fifteenth embodiment will be described with reference to FIG. FIG. 22A is a diagram showing the shape of the stator claw magnetic poles of the fifteenth embodiment. FIG. 22B is another aspect diagram showing the shape of the stator claw magnetic poles of the fifteenth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  In the fifteenth embodiment, the shape of the stator claw magnetic pole 17a-2 of the V-phase stator 17V is different from the shape of the stator claw magnetic pole 17a-2 of the U-phase stator 17U and the W-phase stator 17W. Specifically, as shown in FIG. 22A, the surface area Sv of the stator claw pole 17a-2 of the V-phase stator 17V is equal to the stator claw pole 17a- of the U-phase stator 17U and the W-phase stator 17W. 2 to be larger than the surface area S of 2. With this configuration, the induced voltage of the V-phase stator 17V can be improved and balanced with the U-phase stator 17U and the W-phase stator 17W. For this reason, the shape of these stator claw magnetic poles 17a-2 constitutes a balancing means.

  Further, as shown in FIG. 22B, the skew angle θv of the stator claw magnetic pole 17a-2 of the V-phase stator 17V is equal to that of the stator claw magnetic pole 17a-2 of the U-phase stator 17U and the W-phase stator 17W. It is configured to be larger than the skew angle θ. As shown in the fourteenth embodiment, since the induced voltage tends to increase as the skew angle of the stator claw magnetic pole 17a-2 increases, the induced voltage of the V-phase stator 17V is improved to increase the U-phase stator. It can be balanced with 17U and W phase stator 17W. For this reason, the shape of these stator claw magnetic poles 17a-2 constitutes a balancing means.

  As described above, the balance means is configured by differentiating the shape of the stator claw magnetic poles in the phases arranged at both ends in the axial direction and in the other phases, thereby balancing the voltage induced in the stator of each phase. Can be made.

[Sixteenth embodiment]
Next, a sixteenth embodiment will be described with reference to FIG. FIG. 23A is a side cross-sectional view of a vehicular AC generator that is an embodiment of the rotating electrical machine in the sixteenth example. FIG. 23B is a diagram showing stator claw magnetic poles in the sixteenth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  The sixteenth embodiment differs from the first embodiment in the front bracket 1 and the rear bracket 2 and the stator 17, but the other parts are substantially the same as those in the first embodiment, so that the description thereof is omitted.

As shown in FIG. 23 (a), the front bracket 1 of the sixteenth embodiment has substantially the same thickness on the outer peripheral side in the radial direction and the thickness on the bottom side, and the air hole 3 on the outer peripheral side is formed. The difference is not. Further, the front bracket 1 and the rear bracket 2 are not fitted to each other, and do not extend toward the mating bracket. Therefore, the front bracket 1 has an opening edge at the U-phase stator 17U, and the rear bracket 2 has an opening edge at the W-phase stator 17W.

  In the stator 17 of the sixteenth embodiment, the gap formed between the stator claw magnetic poles 17a-2 is not filled with resin, and is sandwiched in the axial direction by the front bracket 1 and the rear bracket 2 so that each phase is The stator 17 is connected and fixed. Further, as shown in FIG. 23 (b), since the skew is provided in the stator claw magnetic pole 17a-2, the gap between the stator claw magnetic poles 17a-2 is U-phase stator 17U and V-phase stator 17V. , It continues in the axial direction over the W-phase stator 17W.

  With this configuration, the air introduced from the air hole 3 on the inner peripheral side of the front bracket 1 by the rotation of the front fan 13F as shown by the broken line arrow in FIG. Although it flows, since the air hole 3 on the outer peripheral side of the front bracket 1 is sealed, it cannot flow to the outer peripheral side. For this reason, the air flows through the axially continuous gap formed between the stator claw magnetic poles 17a-2, joins the air flowing to the outer peripheral side by the rotation of the rear fan 13R, and the air hole on the outer peripheral side in the rear bracket 2 3 is discharged. Thus, since the amount of air flowing through the gap formed between the stator claw magnetic poles 17a-2 increases, the stator 17 and the rotor 12 as the rotor can be sufficiently cooled. Since the front fan 13F of the sixteenth embodiment has smaller blades and less air flow than the rear fan 13R as in the first embodiment, the amount of air flowing through the gap between the stator claw magnetic poles 17a-2 is further reduced. Can be increased.

[Seventeenth embodiment]
Next, a seventeenth embodiment will be described with reference to FIG. FIG. 24 is a side cross-sectional view of an automotive alternator that is an embodiment of the rotating electrical machine according to the seventeenth example. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  The seventeenth embodiment is different from the sixteenth embodiment in that the front fan 13F is not provided and the outer diameter of the rear fan 13R is larger than the inner periphery of the stator 17 so as to be larger. Although the points are different, the other parts are almost the same as those in the sixteenth embodiment, and the description thereof will be omitted.

  As shown in FIG. 24, since the front fan 13F is not provided in the seventeenth embodiment, an air flow is generated only by the rear fan 13R. This rear fan 13R has an outer peripheral end of the blade that is on the outer peripheral side with respect to the inner periphery of the stator 17. Therefore, when the air flows from the inner peripheral side to the outer peripheral side by centrifugal force, Air is also sucked from the front bracket 1 side through the gap between the opposing stator 17 and the rotor 12. For this reason, even with only the rear fan 13R, the stator 17 can be sufficiently cooled, and it becomes possible to make the device inexpensive as much as the front fan 13F is omitted.

  As described above, in the sixteenth embodiment and the seventeenth embodiment, a gap through which air flows is provided between the stator claw magnetic poles, and the gap is continuous from one end side in the axial direction of the stator core to the other end side. Therefore, the stator can be sufficiently cooled even if there are no coil ends at both ends in the axial direction. Moreover, it becomes possible to cool a stator more effectively by providing the ventilation means which distribute | circulates air to an axial direction with respect to this clearance gap.

[Eighteenth embodiment]
Next, an eighteenth embodiment will be described with reference to FIG. FIG. 25 is a side sectional view of the rotor and the stator in the eighteenth embodiment. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

The stator 17 of each phase in the fifteenth embodiment and the sixteenth embodiment is fixed by being sandwiched in the axial direction by the front bracket 1 and the rear bracket 2, but in the eighteenth embodiment, as shown in FIG. The stator 17 of each phase is integrated by providing a non-magnetic reinforcing ring 21 made of an aluminum alloy or the like on the outer periphery of the stator 17 of each phase. The reinforcing ring 21 has a substantially L-shaped ring with one end in the axial direction extending to the inner peripheral side. Bend it. For this reason, when the reinforcing ring 21 is fixed to the stator 17, the cross section is substantially U-shaped. The reinforcing ring 21 is not limited to a non-magnetic material, and a magnetic material can be used.

  By providing the reinforcing ring 21 in this way, the stator 17 of each phase can be unitized before being sandwiched between the front bracket 1 and the rear bracket 2, and assembling becomes easy and pressure is low. The strength can be reinforced so that the stator core 17a made of a powder iron core is not deformed when being sandwiched between the front bracket 1 and the rear bracket 2, and the vibration resistance strength can be improved.

  Although the embodiments of the present invention have been described above, other possible configurations are listed below.

  In each of the above-described examples, the vehicle AC generator has been described as an embodiment of the rotating electrical machine. However, the present invention can also be applied to a motor that outputs rotational force, a motor generator that combines power generation and driving, and the like. . In particular, the motor may be applied to a drive motor for a hybrid vehicle or an electric four-wheel drive vehicle, a motor for driving a pump, or the like.

  In the first embodiment, only the front bracket 1 is thicker at the radially outer peripheral portion than at the bottom. However, as long as the arrangement space can be secured, the rear bracket 2 is also radially outer peripheral as in the front bracket 1. The wall thickness may be greater than the wall thickness at the bottom. By comprising in this way, the cooling effect of the stator 17 can be improved more. In addition, if fins and irregularities are provided on the inner peripheral surface of the air hole 3 on the radially outer side facing the steps 16F and 16R fitted to the axial ends of the stator 17 in each bracket, the heat radiation area increases. In addition, a further cooling effect can be obtained.

  In the first embodiment, the rotor claw magnetic pole 12b is formed with the root portion 12b-1, the intermediate portion 12b-2, and the tip portion 12b-3. However, the root portion 12b-1 to the tip portion 12b-3 are formed. You may make it incline continuously over. Furthermore, you may make it make it the same width | variety in the circumferential direction from the base part 12b-1 to the front-end | tip part 12b-3. In addition, a plurality of circumferential grooves for preventing eddy currents may be provided on the outer peripheral surface of the rotor claw magnetic pole 12b.

  In the first embodiment, the stator 17 is described as having three phases. However, the stator 17 may have three or more phases. When the number of phases is changed in this way, the phase between the phases is not 120 degrees in electrical angle, but needs to be changed according to the number of phases.

  In the first embodiment, the cross-sectional shape of one line in the stator winding 17b is not specified, but the cross-section may be circular or rectangular. In order to improve the space factor of the stator winding 17b in the stator core 17a, it is better to make the cross section of the stator winding 17b rectangular, and the cross section may be rectangular or square. . As described above, if the cross section of the stator winding 17b is rectangular, it is preferable that the arrangement of the stator windings 17b in the stator core 17a is similarly matched to the rectangular shape.

  In the first embodiment, in order to position the stator core 17a and the connecting plate 18 of each phase in the circumferential direction, the stator core 17a is provided with the concave portion 171 and the connecting plate 18 is provided with the convex portion 181. Positioning is possible by using a jig or attaching a mark without 171 and convex portion 181. If the concave portion 171 is not provided in the stator core 17a in this way, there is no place where the magnetic path area decreases.

  In the first embodiment, resin is filled only in the gap between the stator claw magnetic poles 17a-2 in order to fix the stator 17 of each phase, but the entire stator 17 is made of a non-magnetic material such as resin. Can also be molded. If the stator 17 as a whole is molded in this way, in addition to integrating the phases, the vibration resistance and strength of the low-strength dust core are improved. At this time, it is desirable that the inner peripheral side of the stator claw magnetic pole 17a-2, that is, the portion facing the rotor 12 is not molded so that a gap between the rotor 12 and the rotor 12 does not increase.

  Further, in the first embodiment, skew is provided on both sides in the circumferential direction of the stator claw magnetic pole 17a-2 so as to be substantially trapezoidal. However, since the rotation direction of the rotor 12 is one direction, the magnetic force In order to reduce noise, a skew may be provided only on the side opposite to the rotation direction of the rotor 12. Thus, by providing a skew only on one side of the stator claw magnetic pole 17a-2, the area of the stator claw magnetic pole 17a-2 facing the rotor 12 can be increased while reducing magnetic noise. For this reason, a magnetic flux is easily formed between the stator 17 and the rotor 12, and the induced voltage can be increased.

In the second to fourth embodiments, ferrite magnets are used as the permanent magnets 19 disposed between the rotor claw magnetic poles 12b. However, the precursor of the neodymium (Nd) powder has good affinity. You may use what was bound with the binder provided with the property. Here, the precursor having excellent affinity is, for example, alkoxysiloxane or alkoxysilane which is a precursor of SiO ₂ . The neodymium (Nd) powder has a plate-like shape, and the thickness in the X-axis and Y-axis directions is several times larger than the value in the Z-axis direction, which is the height direction, and the thickness is thin. It has a shape. The size of neodymium (Nd) powder in the X-axis or Y-axis direction should be large. For example, if a powder whose size in the X-axis or Y-axis direction is 45 μm or more is used, it remains. The characteristics are improved. It becomes fine because the powder of neodymium (Nd) breaks during molding, and it is difficult to mix small-sized powder, but it is desirable that more than half of the powder is a powder having a size of 45 μm or more, Furthermore, more preferable magnet characteristics can be obtained when 70% or more is a powder having a size of 45 μm or more. Even more preferable results can be obtained when 90% or more is a powder having a size of 45 μm or more. In addition, heat resistance is improved when neodymium (Nd) further contains dysprosium (Dy). By including this dysprosium (Dy), good magnetic properties are maintained even if the temperature of the rotating electrical machine rises. The content of dysprosium (Dy) is about several percent, and at most 10%. By using a magnet in which SiO ₂ is bound to the neodymium powder described above, it is cheap and further an effect of improving magnetic properties and heat resistance can be obtained. In addition, since the shape can be freely formed by using a magnet bound with this neodymium (Nd) powder, the corners of the permanent magnets in the third and fourth embodiments should be gently formed. Is also possible. In this way, the permanent magnet can be formed in a shape that matches the leakage magnetic flux.

  In the fifth embodiment, the three-phase stator 17 is described. However, in the case where the three-phase or more stator 17 is provided, the stator 17 disposed in the central portion in the axial direction is pivoted. It is better to make the axial length narrow as it goes to both ends in the direction. If it does in this way, the stator 17 of each phase can be made into the axial direction length suitable for the leakage magnetic flux.

  Similarly, in the sixth embodiment, the three-phase stator 17 is described. However, when the three-phase or more stator 17 is provided, the stator 17 disposed in the central portion in the axial direction is provided. It is better to decrease the number of turns of the stator winding 17b as it goes from both ends to the axial ends. If it does in this way, the stator 17 of each phase can be made into the number of turns of the stator winding 17b suitable for the leakage magnetic flux.

  In the seventh embodiment, the radial gap between the rotor claw magnetic pole 12b and the stator 17 of each phase is narrow, and the gap a at the position facing the V-phase stator 17V is narrow, and the U-phase stators 17U and W The outer surface of the rotor claw magnetic pole 12b of the rotor 12 was changed in order to widen the gap b at the position facing the phase stator 17W, but the inner and outer diameters of the U-phase stator 17U and the W-phase stator 17W were changed to V The gap can be adjusted by making it larger than the phase stator 17V.

  In the eighth embodiment, a pair of U-phase, V-phase, and W-phase stators 17 is provided. However, if possible, three or more stators 17 may be provided. Since the induced voltages of the U phase, V phase, and W phase only need to be balanced, the arrangement order can be changed as appropriate.

  Further, in the ninth embodiment, the resin is filled between the stators 17 of each phase, but a thick connecting plate 18 may be disposed as in the first embodiment. At this time, since the connecting plate 18 has a thickness, a concave portion can be provided instead of the convex portion 181 for positioning.

  In the tenth embodiment, the insulating groove 20 having a rectangular cross section is provided. However, the cross section of the insulating groove 20 does not have to be rectangular. For example, the insulating groove 20 may be V-shaped, trapezoidal, or semicircular. I do not care.

  In the eleventh embodiment, the pitch between one phase of the stator claw magnetic pole 17a-2 or the rotor claw magnetic pole 12b is set to 0 degrees and the other interphase pitch is set to 120 degrees. Since they are independent, any position may be used as long as the relative positions of the stator claw magnetic pole 17a-2 and the rotor claw magnetic pole 12b are matched.

  In the sixteenth and seventeenth embodiments, a fan is used in which air flows from the inner peripheral side to the outer peripheral side by centrifugal force. However, instead of the front fan 13F, an axial fan is provided so You may make it flow. Furthermore, the resistance of air flowing through the gap between the stator claw magnetic poles 17a-2 of each phase can be reduced by chamfering the corners at the tip of the stator claw magnetic poles 17a-2 or by attaching a radius. The cooling effect is improved. In addition, you may provide the fin which expands a thermal radiation area in the air circulation part of the stator 17. FIG.

  In the eighteenth embodiment, the reinforcing ring 21 is fixed by caulking. However, the outer periphery of the stator 17 may be molded to form a reinforcing ring. At this time, as a material for molding, it is better to use a high hardness material that can withstand axial force. Further, if cooling fins are provided on the reinforcing ring, a further cooling effect can be obtained.

  Next, inventions other than those described in the claims that can be grasped from each of the above embodiments will be described below together with the effects thereof.

  (1) The stator includes the stator cores of three or more phases arranged in the axial direction and the stator winding, and voltage induced in a phase other than the phases arranged at both ends in the axial direction is set to other phases. The rotating electrical machine according to claim 1, further comprising balancing means for balancing with the induced voltage.

  (2) The rotating electrical machine according to (1), wherein the balancing means is means for increasing a voltage induced in a phase other than the phases arranged at both ends in the axial direction.

  (3) The balance means is a permanent magnet provided between at least the rotor claw magnetic poles and facing at least a phase other than the phases arranged at both ends in the axial direction. The rotating electrical machine described.

  (4) The rotating electrical machine according to (3), wherein the permanent magnet is provided only in a portion facing a phase other than the phases disposed at both ends in the axial direction.

  (5) The permanent magnet is configured such that the magnetic force of the portion facing the phase other than the phase disposed at both ends in the axial direction is stronger than the magnetic force of the portion facing the phases disposed at both ends in the axial direction. The rotating electrical machine according to (3), wherein

  (6) The rotating electric machine according to (5), wherein the permanent magnet is configured so that both axial ends are thin.

  (7) The balance means makes it easier for the magnetic flux passing between the other phase and the rotor to pass through than the magnetic flux passing between the phase arranged at both ends in the axial direction and the rotor. The rotating electrical machine according to (1), wherein

  (8) The rotating electrical machine according to (7), wherein the length of the other stator cores in the axial direction is longer than that of the stator cores disposed at both ends in the axial direction.

  (9) The gap between the stator claw magnetic poles of the other stator core and the rotor is larger than the gap between the stator claw magnetic poles of the stator core and the rotor arranged at both ends in the axial direction. The rotating electrical machine according to (7), which is smaller.

  (10) The balancing means is configured by increasing the number of turns of the stator windings in the other phases than the stator windings of the phases arranged at both ends in the axial direction ( The rotating electrical machine according to 1).

  (11) The rotating electrical machine according to (1), wherein the balance means has different shapes of the stator claw magnetic poles in the phase arranged at both ends in the axial direction and the other phases.

  (12) The stator includes a plurality of phases of the stator cores arranged in the axial direction and the stator winding, and a plurality of these phases are provided, and the same phases are in the same order from one end in the axial direction. The rotating electrical machine according to claim 1, wherein the stator windings arranged in the same manner and having the same phase are connected in series.

  (13) The stator is held in the axial direction by a bracket, and at least one axial end of the stator is in contact with the bracket on the inner peripheral side of the outer peripheral position of the stator winding, and the bracket 2. The air hole through which air can flow is provided in a part in contact with the stator and an opposite part, and further, ventilation means for circulating air is provided in the air hole. Rotating electric machine. With this configuration, the stator winding does not protrude on both sides in the axial direction of the stator core, so that the bracket can be extended to the inner peripheral side of the outer peripheral position of the stator winding. For this reason, even if there is no coil end, the stator can be sufficiently cooled.

  (14) The rotating electrical machine according to (13), wherein the air holes are provided with cooling fins. By comprising in this way, the cooling effect of a stator can be improved more.

  (15) The bracket is divided into a bowl-shaped front bracket and a rear bracket, and the front bracket and the rear bracket sandwich the stator in contact with each other (13). ). With this configuration, heat exchange between the front bracket and the rear bracket is possible, and the entire range of the stator can be cooled.

  (16) The stator includes a plurality of phases of the stator core and the stator winding, and a non-magnetic connecting plate is provided between the stator cores of each phase. The rotating electrical machine according to claim 1, wherein By comprising in this way, the leakage of the magnetic flux between each phase can be reduced reliably.

  (17) The rotating electrical machine according to (16), wherein the stator core and the connecting plate of each phase are provided with positioning portions for positioning each in the circumferential direction. By comprising in this way, the stator iron core of each phase can be positioned reliably in the circumferential direction.

  (18) The stator core is constituted by a stator core constituent member divided into two in the axial direction, and the stator core constituent members have the same shape. The rotating electrical machine according to 1. By comprising in this way, since it is not necessary to manufacture many types of stator core structural members, it can be made cheap.

  (19) The balancing means may be a groove or a non-magnetic layer provided in a circumferential direction at a portion facing between the adjacent stator cores in the rotor. The rotating electrical machine according to (1). By configuring in this way, magnetic flux leakage through the surface of the rotor can be reduced, so that the induced voltage can be balanced.

  (20) The balance means is configured by being divided so that the rotor functions independently at a portion facing between the adjacent stator cores (1). ). By configuring in this way, since the magnetic circuit is configured independently for each phase, the induced voltage can be balanced.

  (21) The stator includes a plurality of phases of the stator core and the stator winding, and each of the stator cores is integrated with a nonmagnetic material on the outer peripheral side. The rotating electrical machine according to claim 1. By constituting in this way, each stator iron core can be integrated, forming the crevice which can flow air between stator claw magnetic poles.

  (22) The rotating electrical machine according to (21), wherein the non-magnetic body provided on the outer peripheral side of the stator core is formed of an annular reinforcing ring made of metal. By comprising in this way, even if it shape | molds a stator core with a powder iron core, intensity | strength can be improved.

It is side surface sectional drawing of the alternating current generator for vehicles as one Embodiment of a rotary electric machine. It is the perspective view which made the cross-section partially the alternating current generator for vehicles as one Embodiment of a rotary electric machine. It is the perspective view which made the rotor and the stator partial cross section. It is a perspective view of a rotor. It is the perspective view which made only the stator a partial cross section, and the figure which looked at the stator from the inner peripheral side. It is a perspective view for every phase of a stator. It is the perspective view which took out one phase in a stator, and the perspective view for every components. It is the output waveform of the voltage induced in each phase in the 1st example, and the output waveform of the voltage induced in each phase. It is the perspective view which made the side surface of the rotor and stator of 2nd Example a cross section. It is the perspective view which made the cross section the side surface of the rotor of 3rd Example, and a stator. It is the perspective view which made the cross section the side surface of the rotor of 4th Example, and a stator. It is side surface sectional drawing of the rotor and stator of 5th Example. It is side surface sectional drawing of the rotor and stator of 6th Example. It is the perspective view which made the side surface of the rotor and stator of a 7th Example a cross section, and the side surface sectional drawing of a rotor and a stator. It is the perspective view which made the side surface of the rotor and stator of an 8th Example a cross section, the side sectional drawing of a rotor and a stator, and the figure which shows the connection of a stator coil | winding. FIG. 10 is a side sectional view of a rotor and a stator of a ninth embodiment, a graph showing a relationship between an interphase gap ratio and an induced voltage, and a graph showing a relationship between an interphase gap ratio and voltage amplitude. FIG. 10 is a side sectional view of a rotor and a stator according to a tenth embodiment and a view of the rotor viewed from the outer peripheral side. FIG. 11 is a side sectional view of a rotor and a stator according to an eleventh embodiment, a diagram illustrating an arrangement of rotor claw magnetic poles and stator claw magnetic poles, and another aspect diagram illustrating an arrangement of rotor claw magnetic poles and stator claw magnetic poles. It is the figure which showed the stator claw magnetic pole in 12th Example, and the graph which showed the relationship between the gap ratio between stator claw magnetic poles, and an induced voltage. It is the figure which showed the rotor claw magnetic pole in 13th Example, and the graph which showed the relationship between the gap ratio between rotor claw magnetic poles, and an induced voltage. It is the figure which showed the relationship between the skew angle of a stator claw magnetic pole, and the induced voltage in the 14th Example, the graph which showed the skew angle of a stator claw magnetic pole, and the induced voltage, and the graph which showed the relationship between the skew angle of a stator claw magnetic pole, and a voltage amplitude. . It is a figure which shows the stator nail | claw magnetic pole in 15th Example. It is a figure which shows the side sectional view and stator claw magnetic pole of the alternator for vehicles as one embodiment of the rotating electrical machine in the 16th example. It is side surface sectional drawing of the alternating current generator for vehicles as one Embodiment of the rotary electric machine in 17th Example. It is side surface sectional drawing of the rotor and stator in 18th Example.

Explanation of symbols

1 Front bracket 2 Rear bracket 3 Air hole 12 Rotor (rotor)
12b Rotor claw magnetic pole 12b-1 Root part 12b-2 Intermediate part 12b-3 Tip part 13F Front fan 13R Rear fan 14 Field winding 17 Stator 17a Stator iron core 17b Stator winding 17a-2 Stator claw magnetic pole 18 Connecting plate 19 Permanent magnet

Claims (20)

A rotating electric machine in which a rotor rotates relative to a plurality of identical stators,
The rotor includes a field winding wound about the rotation axis, provided so as to surround the the interfacial windings, the rotor pawl magnetic pole portions facing the stator pawl magnetic pole of the stator Having a rotor core with
The stator is formed in a stator winding that is annularly wound around the outer periphery of the rotor, a stator core that is provided to surround the stator winding, and the stator core And the stator claw magnetic poles alternately extending from both sides in the axial direction at a portion facing the rotor ,
The stator core is composed of two stator core constituent members having substantially the same shape in which a recess is formed,
Between the stator, a non-magnetic material formed with convex portions on both sides is provided,
The rotating electrical machine characterized in that the concave portion and the convex portion are fitted, and the plurality of stators form a predetermined electrical angle .   2. The rotating electrical machine according to claim 1, wherein the stator claw magnetic pole is provided with a skew of 0 to 20 degrees with respect to an axial line.   The rotating electric machine according to claim 2, wherein the stator claw magnetic pole is provided with a skew of 5 to 20 degrees with respect to an axial line.   The rotating electric machine according to claim 3, wherein the stator claw magnetic pole is provided with a skew of 15 degrees to 20 degrees with respect to an axial line.   2. A gap through which air flows is provided between the stator claw magnetic poles, and the gap is continuous from one end side to the other end side in the axial direction of the stator core. The rotating electrical machine described. The stator includes a plurality of phases of the stator core and the stator winding,
2. The rotating electrical machine according to claim 1, wherein the stator winding of each phase is extended to one end side in the axial direction of the stator through a gap between the stator claw magnetic poles. The stator includes a plurality of phases of the stator core and the stator winding,
2. The rotating electrical machine according to claim 1, wherein a gap between the stator claw magnetic poles in each phase is continuously filled with a nonmagnetic material and connected.   The rotating electrical machine according to claim 1, further comprising ventilation means for circulating air in an axial direction in a gap between the rotor and the stator. The stator includes a three-phase stator core and the stator winding,
2. The rotating electrical machine according to claim 1, wherein the stator core is configured such that a gap between phases in the stator core / an axial length of the stator core for one phase is 0.05 to 0.2.   10. The rotating electrical machine according to claim 9, wherein a gap between phases in the stator core / an axial length of the stator core for one phase is 0.07 to 0.15. 10.   11. The rotating electrical machine according to claim 10, wherein the stator core is configured such that a gap between phases in the stator core / an axial length of the stator core for one phase is 0.1 to 0.13.   The root part of the rotor claw magnetic pole is formed wider than the intermediate part, the intermediate part is formed wider than the tip part, and the intermediate part is formed with a substantially constant width. The rotating electrical machine according to claim 1. A rotating electrical machine in which a rotor rotates relative to a plurality of identical stators,
A Landel-type rotor having a field winding and 12 to 24 magnetic poles;
A stator iron core provided at a portion facing the outer periphery of the rotor, and a stator composed of a stator winding wound around the stator iron core;
The stator winding is annularly wound around the outer periphery of the rotor,
The stator core is composed of two stator core constituent members having substantially the same shape having stator claw magnetic poles alternately extending from both sides in the axial direction at a portion facing the rotor and having recesses formed therein. ,
Between the stator, a non-magnetic material formed with convex portions on both sides is provided,
The rotating electrical machine characterized in that the concave portion and the convex portion are fitted, and the plurality of stators form a predetermined electrical angle .   14. The rotating electrical machine according to claim 13, wherein the number of claw magnetic poles of the stator is 12 to 24.   The rotating electrical machine according to claim 13, wherein the number of poles of the rotor and the number of claw magnetic poles of the stator are the same.   The rotating electrical machine according to claim 15, wherein the number of poles of the rotor and the number of poles of the stator are 16 poles. A rotating electrical machine in which a rotor rotates relative to a plurality of identical stators,
A Landel-type rotor having a field winding and a plurality of rotor claw magnetic poles;
A stator iron core provided at a portion facing the outer periphery of the rotor, and a stator composed of a stator winding wound around the stator iron core;
The stator winding is annularly wound around the outer periphery of the rotor,
The stator core is composed of two stator core constituent members having substantially the same shape having stator claw magnetic poles alternately extending from both sides in the axial direction at a portion facing the rotor and having recesses formed therein. ,
Between the stator, a non-magnetic material formed with convex portions on both sides is provided,
The concave portion and the convex portion are fitted, and the plurality of stators are configured to form a predetermined electrical angle,
A rotating electric machine characterized in that a width of a gap between the stator claw magnetic poles / a width of a substantially central position in the axial direction of the stator claw magnetic poles is set to 0.05 to 0.3. 18. The rotating electrical machine according to claim 17, wherein a width of a gap between the stator claw magnetic poles / a width of a substantially central position in the axial direction of the stator claw magnetic poles is set to 0.1 to 0.2. 19. The rotating electrical machine according to claim 18, wherein a width of a gap between the rotor claw magnetic poles / a width of a substantially central position in the axial direction of the stator claw magnetic poles is set to 0.3 to 0.6. The rotating electrical machine according to claim 19, characterized in that the width of the substantially axial center position in the width / the stator pawl magnetic poles of the gap between the rotor pawl magnetic poles and 0.35 to 0.45.

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